Caoutchouc substance and process of making same.



' FRITZ HOFMANN AND KONRAD DELBRU'CK, OF ELBERFELD, GERMANY, ASSIGNORS'TO FARBENFABRIKEN VORM. FRIEDB. BAYER 85 $0., 0F ELBEEFELD, GERMANY. A

CORPOTION OF G 2:: ti iKY,

,caou'rcnouo suns'raucn awn rnocnss or MAKING SAME.

nosa eaa.

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To all whom it may concern:

Be it known that we, FRITZ HorMANN and Koiwmn DELBRfi K, doctors of philosophyQchemists, citizens of the German Em- 'pire, residing at Elberfeld, Germany, have invented new and useful Tmprovements in Caoutchouc Substance and Process of Making Same, of which the following is a specification.

In the Journal fz'lr Praktische Uhgzmie, vol. 64, p. 109/110, Kondakow. described a polymerization product obtained by autopolymerization of beta-'gamma-dimethylmaterial.

erythrene. This product is totallydifierent from the caoutchouc substance obtained by heating beta-gamma-dimethylerythrene. It is a white crumbly mass which so quickly changes in the air that it can be rolled into sheets only if it is subjected to this process immediately after its production. The sheets thus obtained however can likewise only be kept for a very short time and quickly resinity in the air so that theyare useless for technical purposes. It has now been found that this substance can be c0nverted into a stable and technically very valuable product which can be used as a substitute gfor caoutchouc or gutta percha, by treating it with basic substances, which treatment can also be carried out during the autopolymerization, the basic-substance remaining partly or; entirely in the treated process described by Kondakow are put into- 1000 parts of water containing anilin .(2 per cent.) and are therein macerated for 24 hours.

Example 2:1000 parts of beta-gammadimethylerythrene are mixed with 300 parts of the product described in Example 1 and 3.5 parts of dimethylanilin. After l weeks the caoutchouc like product is obtained.

Example 3 2-100 parts of the white product f polymerization obtained from betagam a-dimethylerythrene according to the process described by Kondakow are mixed with 20 parts of dimethyl-ortho-toluidin.

Patented ea. is, ota.

In this way-a caoutchouc like stable product is obtained.

Instead of anilin also other basic com- .pounds can'be used',' such as ammonia, di-

lVe claim 1. The process for the production of a caoutchouc like substance which comprises treating with an alkaline agent the autopolymerization product of beta-gamma-dimethylerythrene, substantially as described. 2. The process for the production of a caoutchouc-like substance which comprises treating with a. nitrogenous base the-autopolymerization product of beta-gamma-dimethylerythrene, substantially as described. 3. The process for the production of a caoutchouc-like substance which comprises treating with an amin the autopolymerization product of beta-gamma-dimethylerythrene, substantially as described. p

4. The process for the production of a caoutchouc-like substance which comprises treating with an aromatic amin the automethylerythrene, substantially as P described.

5. The process for the production of a caoutchouc-like substance, which comprises treating with anilinthe autopolymerization product of beta-gamma-dimethylerythrene, substantially as described.

6. The process for the production of a caoutchouc-like substance which comprises adding beta-gamma-dimethylervthrene and a small amount of an alkaline agent to the product of autopolymerization of betagamma-dimethylerythrene, and converting themixture into a caoutchouc like substance. 7. The processfcr the production of a caoutchouc-like substance, which comprises adding beta-gamina-dimethylerythrene and a small amount of an amin to the product of autopolymerization of beta-gamma-dimethylerythrene and. converting the mix ture'into a caoutchouc-like substance.

8. The process for the production of a caoutchouc-like substance, which comprises adding beta-gammasdimethylerythrene and product of autopolymerization of betagamma-dimethylerythrene and converting the mixture into a, caoutchouc-like substance."

methylamin, diethylamin, caustic soda, etc.

polymerization "product of bet-a-gamma-dia small amount of an aromatic amin to the 9. The process for the production of a caoutchouc-like substance. which comprises addin beta-gamma-dimethylerythrene and a small amount of an anilin to the product of autopolymerization of beta-gamma-dimethylerythrene, and converting the mix- 'ture into a caoutchouc-like substance.

10. As a new product, a stable caoutchouc-v like product comprising an autopolymerization product of beta-gamma-diinethylerythrene insoluble in alcohol and containing a small amount of abasic substance, substantially as described.

11. As a new product, a stable caoutchouclike product comprising an autopolymerization product of beta-gamma-dimethyleryth'rene insoluble in alcohol and containing a small amount of a nitrogenous base, substantially as described.

- 12. As a new product, a stable caoutchouclike product comprising an autopolymerization product of beta-gamma-dimethylcrythrene insoluble in alcohol and containing a small amount of an amin, substantially as described.

13. As a new product, a stable caoutchouclike product comprising an autopolymerization product of beta-gamma-dimethylerythrene insoluble in alcohol and containing a small amount of an aromatic amin, substantially as described.

14. As a new product, a. stable caoutchouclike product comprising an autopolymerization product of beta-ganmia-dimcthylerythrene insoluble inalcohol and containing a small amount of anilin, substantially as described.

In testimony whereof we have hereunto set our hands in the presence of two sub,- scribing witnesses.

FRITZ HOFMANN. [1,. s.] KONRAD DELBRUCK. [1,. s.] Witnesses:

HELEN NUFER, ALBERT NUFER. 

